2005 Lexus GS (Mk3)
Browse our directory of 2005 Lexus GS (Mk3) vehicles. Access instant MOT history reports, tax status, and reliability insights for any registration listed below.
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Showing registrations 1–40 of 1,076 for the 2005 Lexus GS (Mk3). Select any plate for an instant vehicle history check.
Common Problems & Reliability
The 2005 Lexus GS (Mk3) has 7 known issues. 2 of these are classified as serious faults that could be expensive to repair. 3 are moderate concerns worth inspecting before purchase.
Brake Actuator Failure
SeriousThe hydraulic brake actuator is a common failure point on this generation, leading to a loss of power assistance, very long pedal travel, and a loud barking or humming noise from under the bonnet. Repair bills are substantial, often exceeding £2,000, and the issue is more prevalent on high-mileage GS 450h and GS 430 models.
Symptoms: Brake warning lights illuminated, Constant humming or barking from under bonnet...
Est. repair cost: £1,800–£2,500
Front Lower Suspension Ball Joint Wear
SeriousThe GS Mk3 uses double-wishbone front suspension with lower ball joints that carry substantial dynamic loads. Over time, the internal nylon seat wears and the rubber boot perishes, allowing water and grit to enter. Severe play can develop, causing steering knock, uneven tyre wear, and in extreme cases, separation of the joint.
Symptoms: Clunking or knocking over small bumps, Vague steering feel at motorway speeds...
Est. repair cost: £180–£400
Leaking Rear Shock Absorbers
ModerateThe Adaptive Variable Suspension (AVS) shocks are prone to leaking and are extremely expensive to replace with OEM parts.
Symptoms: Mist of oil on the shock absorber body, Bouncy ride...
Est. repair cost: £600–£1,000
Leaking Rear Shock Absorbers (AVS)
ModerateThe Adaptive Variable Suspension (AVS) shocks fitted to higher-spec GS models are prone to oil leaks over time. A leaking shock causes a bouncy ride, uneven ride height, and can trigger an AFS warning light. Replacement with OEM parts is expensive.
Symptoms: Mist of oil visible on shock absorber body, Bouncy or unsettled ride over bumps...
Est. repair cost: £600–£1,000
Carbon Buildup on Intake Valves (GS 300)
ModerateThe 3.0-litre 3GR-FSE V6 in the GS 300 uses direct injection, which can lead to carbon accumulation on the intake valves over time. This causes rough idling, reduced throttle response, and occasional misfires, particularly on cars that have done frequent short journeys.
Symptoms: Rough or uneven idle when warm, Reduced acceleration and throttle response...
Est. repair cost: £400–£800 (cleaning)
Headlight Beam Pattern Failure and Washer Faults
MinorAge-related clouding of polycarbonate headlamp lenses and wear on HID bulbs or adjuster mechanisms can lead to MOT failure for incorrect beam pattern. Headlamp washer nozzles can also become clogged or misdirected, reducing effectiveness in winter salt conditions.
Symptoms: Cloudy or yellowed headlamp lenses, Headlamp beam pattern advisory on MOT...
Est. repair cost: £200–£450
Dashboard HVAC Servo and Material Degradation
MinorThe dashboard and climate control servo motors on some GS Mk3 models can develop clicking or cracking sounds, particularly in hot weather. The dashboard material can degrade, and the motorized control panel next to the steering wheel can fail, leaving buttons unresponsive.
Symptoms: Clicking noise from dashboard when adjusting climate, Dashboard material cracking or degrading...
Est. repair cost: £150–£400
Buying Tips for the 2005 Lexus GS (Mk3)
- Inspect rear shock absorbers for oil mist if AVS fitted
- Check headlight lenses for clarity and beam alignment
- Confirm full service history to maintain Relax warranty eligibility
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